Believe

“A hero is more than a person, a hero is a belief. A belief that, against impossible odds, the world can be saved—and that the world is still worth saving. Heroes inspire that belief in us. They renew our faith and give us that most precious of all gifts—hope. The world needs heroes. That's why, when a true hero arrives, the world will honor him.”

Museum - A live-action TV commercial featuring Retired Major Pawel Czernek, a UNSC veteran that fought in the Battle of New Mombasa alongside SPARTAN-117, reminiscing of his memories of the inspiring hero.

Believe Plaques - Plaques were displayed in several locations. The dates on some of these plaques are canonically incorrect, describing Human-Covenant War events involving John-117 happening in mid-2553 and later, despite the fact that the war had ended and John was Missing In Action by that time.

Art Galleries - Several photographs were shown in art galleries in the UK that were photos by Jake Courage.

The creators of the campaign were not informed of the story of Halo 3, leading to multiple inconsistencies with the story depicted in Believe, and the game's story. Due to this, no aspect of the marketing campaign can be considered canon.

There was also an in-universe look at the creation of the Believe models.[4]

On Xbox.com, there is a collection of photographs from war photographer Jake Courage titled "Shooting a Hero".

Stan Winston Studio was responsible for the diorama featured in the Halo 3 Believe ads.[citation needed]

The melody that was used in the Believe commercials was created by Polish pianist Frédéric Chopin and is called "Preludes #15, Raindrop". Incidentally, the Xbox 360 games Eternal Sonata is based on Chopin's death and Saints Row also contains "Raindrop."

One of the trailers for the first-person shooter game Bulletstorm (published by Electronic Arts and developed by Epic Games/People Can Fly), titled Last Call, parodies Believe (specifically the diorama).

At the Halo 3: ODST map Mombasa Streets, there are several graffiti where you can read BELIEVE, maybe being a reference to the marketing campaign for Halo 3 of the same name.

A new trailer released for the game Serious Sam HD entitled "Seriously Believe" is an obvious tribute or parody to the Believe campaign, utilizing a selection of frozen in-game views in place of the models, a similar track, and a black screen at the end with the words "Seriously Believe" appearing, very similar to the original "Believe" trailer.

The "Believe" ads were the first times that the Human-Covenant war was given such a grim outlook outside of the comics and novels. This continued on to the Halo 3: ODST and Halo: Reach ads. Specifically, We Are ODST, and Deliver Hope.